Osiill eor geinding a boltingr sumac



s; w. POWELL.

Bark Mill.

No. 12,487. Patented March 6, 1855.

u v Q Q :In w w w vif? c O o Q o @O l ,f e .O v O .4 u u u u u u /A 7'\l/v A g 2E' Y 72 n. Pneus mmm-Lumumba wmhingm. mc.

`To all whomdz'may. i

imma PENNSSZLVNIAT 'Y 1. Mi -ORGNDING AND nomine sUivLAc. i

` `snede" tin-f Lettsraten' No. 12,487; dated March e, 1855.

Be it known thatl, SAMUEL flJoWELL,

` of Tuscaroraivallemf in the county of Juniata and State lofPennsylvania,ihave' in- .,vented `a newfandffImproved Machine forScreening, Cleaning; 1 and` Grinding Sumac `and other` Articles ;`1 andI jdohereby declare.` the following His a full and exact dey scriptionthereof, "reference tbeing hadf to, the accompanying drawings and to`thel letf" ters of reference marked thereon. 1.

The naturefof "invention consists of a frame containing 'two cylindricalbars `which revolve,`the `'upper barhaving a series of cuttersfsetin aspiral position around it,r and inclosedin a hollow cylinderV or sheath,perforated `with slotsgand the lower bar `having projectionsfromitssurface and in y a spiral direction. `In the under side of the` 1 frameare twolontlets, out of one of which` 3 passes the leaves of sumac, or.other article, i into a hopper fand thence down intoy a frame supportinga `cylinder arranged with cutters,`the inner upper side of saidframealso having stationary cutters, and the space b-eflow and at thesides of the cylinder closed with a fine sieve fplate "through which thene particles oflfsumac eventually pass.

" feo To enable others" skilled -in the art to make` and use myinvention Iwill proceed to describe its ijconstruction and operation.

` A frame, suitable for the purpose of sup- ,porting `and inclosing` thecylinders-as A,

` `having their` base` outward. 1 r 45 B Figurel, is constructedso as toleave a `space between the slotted hollow cylinder or sheathing-u Fig.`1-and it. -A largecylindent), Fig.1, and a smaller one,0, Fig. 1,

y y are placed in this frame, having drums upon "the productionof theiraxes. These drums,

d, Fig. 1, are for the application of power.

Uponythe surface `ofthe upper cylinder, Z2,

Fig. 1,` and arranged spirally, `are cutters e, Fig. 1. These cutters]`are conicalin shape teethalso arrangedspirally.` Slotted `hollow`cylinder or sheathing-a section shown at a,Fig.1-.is f'lttedat the endsinto the `frame and envelopes"` the upper cylinder- Y), Fig. 1--`and hasan `openingat g, Fig.

` ul-directly' under the hopper or that aperture in` the frame throughwhich the l i material to be acted upon is introducedinto the machinery.Atthe lopposite end of this Projecting [fromthe surface of the `lowercylinder are vbut underneath, is another aprture-at l1., Fig. 1.

,. There is a space allowed between the` lower cylinder, c, I4 ig. 1,and the frame, and an'aperture in the lower side of the frame,

at z', Fig. 1 -directly beneath the hopper, g,

Fig. 1. This aperture communicates with another hopper, le, Fig. 1, of asmall frame `which supports a cylinder-m, Figs. 1 and B-actuated atright angles with the two upper or above mentioned cylinders. Thiscylinder Ahas conical cutters projecting from its surface, and its uppersurface is covered by a cap, n, Fig. 1, having conical cuttersprojecting from its surface, and so arranged with reference to those onthe cylinder-1m,

Fig. 1-as not to interfere with them in theV revolution of the cylinder.This cap, n, Fig. 1, has a slot oraperture in the top so as to `allowmaterials to pass through the hopper, 7c, Fig. 1, and upon the cylinder,fm., Fig. 1. Around this cylinder, m, Fig. 1, and below the cap is a nesieve, g, Fig. 3, and so tted to the frame and aroundthe cylinder as toallow the latter to revolve freely. There is a small gate, 0, Fig. 1 onthe side of the cylinder, m, Fig. 1, and directly under the cap Q, Fig.1, and at the upper edge of the sieve. The cylinder, m, Figs. 1 and 3,has a drum, p, Fig. 3, upon the production of its axis, for the ,appli-ication of power. l

I will now describe the operation of screening, cleaning, and grindingsumac and other articles by the above machinery. To illustrate we willemploy the article of sumaC. It is placed in the hopper, g, Fig. 1,

and thence passes upon the cylinder, b, Fig. 1,` and between it and thehollow `cylinder or slotted sheathing, a, Fig. 1. The action of thecutters, e, Fig. 1, soon reduces it,

upon the cylinder, m, Figs. l and 3, and is reduced to powder by theaction 0f the cutters on the cylinder and those, g, Fig. 1, upon thecap. The powdered particles pass or escape through the sieve, Q,Fig.'1,and the result is ready for use. Thus is performed the Whole operationof screening, cleaning, grinding and bolting. Should pebbles or otherhard substance get into'the machine they are allowed to pass olf throughthe small gate, V0, Fig. l, just above the sieve, and which may beopened or closed at Will by a smell thumb screw or otherwise.

